Pulse or digital communications – Systems using alternating or pulsating current – Plural channels for transmission of a single pulse train
Patent
1996-03-11
1998-10-20
Ghebretinsae, Temesghen
Pulse or digital communications
Systems using alternating or pulsating current
Plural channels for transmission of a single pulse train
370228, 370519, H04K 110, H04L 2728
Patent
active
058258213
ABSTRACT:
A termination cross-connect device, receiving the first and second digital signals from the previous cross-connect device through different routes, checks whether the sink-side J1 identification is included in the first and second digital signals. When it is included, the termination cross-connect device adjusts a phase difference between the first and second digital signals based on the J1 byte such that the first and second digital signals coincide in phase with each other. After the first and second digital signals coincide in phase with each other, the hitless switching is performed from the first path to the second path. Not only a route length delay differences but also interconnection delays developed in the previous cross-connect device may be canceled out by performing the delay adjustment when the cross-connect switch of the previous cross-connect device is active but when it is inactive.
REFERENCES:
patent: 4380814 (1983-04-01), Shinmyo
patent: 4686675 (1987-08-01), Motimoto et al.
patent: 5471332 (1995-11-01), Shiragaki et al.
Ghebretinsae Temesghen
NEC Corporation
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